mirror of https://github.com/GNOME/gimp.git
313 lines
8.3 KiB
C
313 lines
8.3 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995-2002 Spencer Kimball, Peter Mattis, and others
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*
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* gimp-internal-data.c
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* Copyright (C) 2017 Ell
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <gegl.h>
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#include "libgimpbase/gimpbase.h"
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#include "core-types.h"
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#include "gimp.h"
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#include "gimp-gradients.h"
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#include "gimp-internal-data.h"
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#include "gimpdata.h"
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#include "gimpdataloaderfactory.h"
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#include "gimperror.h"
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#include "gimpgradient-load.h"
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#include "gimp-intl.h"
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#define GIMP_INTERNAL_DATA_DIRECTORY "internal-data"
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typedef GimpData * (* GimpDataGetFunc) (Gimp *gimp);
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typedef struct _GimpInternalDataFile GimpInternalDataFile;
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struct _GimpInternalDataFile
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{
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const gchar *name;
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GimpDataGetFunc get_func;
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GimpDataLoadFunc load_func;
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};
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/* local function prototypes */
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static gboolean gimp_internal_data_create_directory (GError **error);
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static GFile * gimp_internal_data_get_file (const GimpInternalDataFile *data_file);
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static gboolean gimp_internal_data_load_data_file (Gimp *gimp,
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const GimpInternalDataFile *data_file,
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GError **error);
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static gboolean gimp_internal_data_save_data_file (Gimp *gimp,
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const GimpInternalDataFile *data_file,
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GError **error);
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static gboolean gimp_internal_data_delete_data_file (Gimp *gimp,
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const GimpInternalDataFile *data_file,
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GError **error);
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/* static variables */
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static const GimpInternalDataFile internal_data_files[] =
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{
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/* Custom gradient */
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{
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.name = "custom" GIMP_GRADIENT_FILE_EXTENSION,
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.get_func = (GimpDataGetFunc) gimp_gradients_get_custom,
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.load_func = gimp_gradient_load
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}
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};
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/* public functions */
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gboolean
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gimp_internal_data_load (Gimp *gimp,
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GError **error)
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{
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gint i;
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g_return_val_if_fail (GIMP_IS_GIMP (gimp), FALSE);
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g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
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for (i = 0; i < G_N_ELEMENTS (internal_data_files); i++)
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{
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const GimpInternalDataFile *data_file = &internal_data_files[i];
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if (! gimp_internal_data_load_data_file (gimp, data_file, error))
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return FALSE;
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}
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return TRUE;
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}
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gboolean
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gimp_internal_data_save (Gimp *gimp,
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GError **error)
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{
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gint i;
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g_return_val_if_fail (GIMP_IS_GIMP (gimp), FALSE);
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g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
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if (! gimp_internal_data_create_directory (error))
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return FALSE;
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for (i = 0; i < G_N_ELEMENTS (internal_data_files); i++)
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{
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const GimpInternalDataFile *data_file = &internal_data_files[i];
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if (! gimp_internal_data_save_data_file (gimp, data_file, error))
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return FALSE;
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}
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return TRUE;
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}
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gboolean
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gimp_internal_data_clear (Gimp *gimp,
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GError **error)
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{
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gint i;
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g_return_val_if_fail (GIMP_IS_GIMP (gimp), FALSE);
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g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
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for (i = 0; i < G_N_ELEMENTS (internal_data_files); i++)
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{
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const GimpInternalDataFile *data_file = &internal_data_files[i];
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if (! gimp_internal_data_delete_data_file (gimp, data_file, error))
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return FALSE;
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}
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return TRUE;
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}
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/* private functions */
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static gboolean
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gimp_internal_data_create_directory (GError **error)
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{
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GFile *directory;
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GError *my_error = NULL;
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gboolean success;
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directory = gimp_directory_file (GIMP_INTERNAL_DATA_DIRECTORY, NULL);
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success = g_file_make_directory (directory, NULL, &my_error);
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g_object_unref (directory);
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if (! success)
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{
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if (my_error->code == G_IO_ERROR_EXISTS)
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{
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g_clear_error (&my_error);
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success = TRUE;
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}
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else
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{
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g_propagate_error (error, my_error);
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}
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}
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return success;
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}
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static GFile *
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gimp_internal_data_get_file (const GimpInternalDataFile *data_file)
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{
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return gimp_directory_file (GIMP_INTERNAL_DATA_DIRECTORY,
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data_file->name,
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NULL);
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}
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static gboolean
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gimp_internal_data_load_data_file (Gimp *gimp,
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const GimpInternalDataFile *data_file,
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GError **error)
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{
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GFile *file;
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GInputStream *input;
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GimpData *data;
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GList *list;
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GError *my_error = NULL;
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file = gimp_internal_data_get_file (data_file);
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if (gimp->be_verbose)
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g_print ("Parsing '%s'\n", gimp_file_get_utf8_name (file));
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input = G_INPUT_STREAM (g_file_read (file, NULL, &my_error));
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if (! input)
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{
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g_object_unref (file);
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if (my_error->code == G_IO_ERROR_NOT_FOUND)
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{
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g_clear_error (&my_error);
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return TRUE;
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}
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else
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{
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g_propagate_error (error, my_error);
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return FALSE;
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}
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}
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list = data_file->load_func (gimp->user_context, file, input, error);
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g_object_unref (input);
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g_object_unref (file);
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if (! list)
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return FALSE;
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data = data_file->get_func (gimp);
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gimp_data_copy (data, GIMP_DATA (list->data));
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g_list_free_full (list, g_object_unref);
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return TRUE;
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}
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static gboolean
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gimp_internal_data_save_data_file (Gimp *gimp,
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const GimpInternalDataFile *data_file,
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GError **error)
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{
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GFile *file;
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GOutputStream *output;
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GimpData *data;
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gboolean success;
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file = gimp_internal_data_get_file (data_file);
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if (gimp->be_verbose)
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g_print ("Writing '%s'\n", gimp_file_get_utf8_name (file));
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output = G_OUTPUT_STREAM (g_file_replace (file, NULL, FALSE,
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G_FILE_CREATE_NONE,
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NULL, error));
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g_object_unref (file);
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if (! output)
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return FALSE;
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data = data_file->get_func (gimp);
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/* we bypass gimp_data_save() and call the data's save() virtual function
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* directly, since gimp_data_save() is a nop for internal data.
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*
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* FIXME: we save the data whether it's dirty or not, since it might not
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* exist on disk. currently, we only use this for cheap data, such as
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* gradients, so this is not a big concern, but if we save more expensive
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* data in the future, we should fix this.
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*/
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gimp_assert (GIMP_DATA_GET_CLASS (data)->save);
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success = GIMP_DATA_GET_CLASS (data)->save (data, output, error);
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g_object_unref (output);
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return success;
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}
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static gboolean
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gimp_internal_data_delete_data_file (Gimp *gimp,
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const GimpInternalDataFile *data_file,
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GError **error)
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{
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GFile *file;
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GError *my_error = NULL;
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gboolean success = TRUE;
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file = gimp_internal_data_get_file (data_file);
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if (gimp->be_verbose)
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g_print ("Deleting '%s'\n", gimp_file_get_utf8_name (file));
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if (! g_file_delete (file, NULL, &my_error) &&
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my_error->code != G_IO_ERROR_NOT_FOUND)
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{
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success = FALSE;
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g_set_error (error, GIMP_ERROR, GIMP_FAILED,
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_("Deleting \"%s\" failed: %s"),
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gimp_file_get_utf8_name (file), my_error->message);
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}
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g_clear_error (&my_error);
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g_object_unref (file);
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return success;
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}
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